Below is a ranking of albums by idol groups that I believe comprise the top 10 most successful (this includes physical sales, digitals [international + domestic], and any certifications). Note: no Japanese albums.
- Map of the Soul: 7 (4.5M copies sold, 1.8B Spotify streams, 3.3B digital points)
- KMCA: 4× Million
- BEA: Gold
- BPI: Gold
- RIAA: Platinum
- RIAJ: Platinum
- RMNZ: Gold
- SNEP: Platinum
- Map of the Soul: Persona (4M copies sold, 1.6B Spotify streams, 3.2B digital points/2.5M confirmed downloads)
- KMCA: 4× Million
- BEA: Gold
- BPI: Gold
- RIAA: Gold
- RIAJ: Gold
- Love Yourself: Answer (2.8M copies sold, 1.6B Spotify streams, 2.4B digital points/2.5M confirmed downloads)
- KMCA: 2× Million
- BPI: Gold
- RIAA: Platinum
- RIAJ: Gold
- RMNZ: Gold
- Love Yourself: TEAR (2.5M copies sold, 1.8B Spotify streams, 2.5B digital points/2.5M confirmed downloads)
- KMCA: 2× Million
- BPI: Silver
- RIAJ: Gold
- BE (3.6M copies sold, 1.8B Spotify streams, 1.8B digital points)
- KMCA: 3× Million
- RIAJ: Platinum
- Love Yourself: HER (2.4M copies sold, 1.4B Spotify streams, 1.2B digital points/4,129,927 downloads)
- BPI - Silver
- THE ALBUM (1.3M copies sold, 1.5B Spotify Streams, 1.8B digital points)
- KMCA: 1× Million
- Wings (1.3M copies sold, 1.4B Spotify streams, 79M digital points/3,940,040 downloads)
- MADE (728,942 copies sold [4 single albums + studio album], 615M Spotify streams, 16,164,827 downloads)
- RIAJ: Gold
- You Never Walk Alone (1.2M copies sold, 570M Spotify streams, 1.7B digital points/2,923,999 downloads)
- BPI: Silver
I didn’t double count for Spotify streams, album-exclusive tracks only. Repackages are counted as their own entries.
Before I get asked, MADE is included because of the standard release (all of the singles are included in the tracklist). It’s #9 due to the monster success of the singles run more than a year before the studio album was released.